Traskite

traskite

muirite

verplankite

sanbornite

Images

Formula: Ba₂₁Ca(Fe²⁺,Mn,Ti)₄(Ti,Fe,Mg)₁₂(Si₁₂O₃₆)(Si₂O₇)₆(O,OH)₃₀Cl₆.14H₂O
Cyclosilicate (ring silicate), barium-bearing mineral
Crystal System: Hexagonal
Specific gravity: 3.71 measured, 3.75 calculated
Hardness: 5
Streak: Light reddish brown
Colour: Red-brown
Solubility: Insoluble in dilute acids and bases
Common impurities: Al,Mn,Mg,Ca,Sr,K
Environments

Metamorphic environments

Localities

At the type locality, the Esquire No. 1 claim, Rush Creek, Big Creek-Rush Creek Mining District, Fresno county, California, USA, traskite was found in October 1962 in the same piece of that had yielded verplanckite and muirite. Traskite occurs as tiny grains, generally less than 1 mm in diameter, sporadically distributed in the same rocks as verplanckite and muirite, but it also is present in quartz-sanbornite rock in which verplanckite and muirite are lacking. Traskite has been found in several other outcrops here (AM 50.314-340). Associated minerals include sanbornite, quartz, celsian, diopside, taramellite, fresnoite, muirite, verplanckite, pyrrhotite and pyrite (HOM).

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